I got 4 plastic bulbs with blue and black base and clips in this box. They are LED lights that work on 3 AAAbatteries each (not included). The battery holder has a slide groove so you can not put the battery cage in wrong.There is a power button that you use to cycle thru the 4 different stages of high, low ,flash, and S.O.S.. Durrable and waterproof so cna be hung almost anywhere. #Rankboosterreview #Sponsored #LENPOW https://www.amazon.com/LENPOW-Emergency-Equipment-Activities-Backpacking/dp/B077NV3XG3